Daniel Low
Forum Replies Created
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Rich,
Great tip.
One thing to remember about compressing to PhotoJPEG is that if the quality slider is set to 74% or below then the clip will have colour subsampling values of 4:2:0, but at 75% or above it’ll be 4:2:2.
Sadly, it’s amazing how many PC users don’t have Quicktime installed and indeed shun or avoid the use of it because it’s ‘Apple’.
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The following Video formats are supported:
* MPEG-4 Part 2 – Simple Profile + bvops (including DivX files in this format)
* H.263 Profile 0 and Profile 3The following Video file extensions are also supported:
* .avi containing MPEG4 Part 2 and H.263
* .mov containing MPEG4 Part 2 and H.263
* .3gp containing MPEG4 Part 2 and H.263
* .mp4 containing MPEG4 Part 2 and H.263
* .m4v containing MPEG4 Part 2 and H.263
* .mpg containing MPEG4 Part 2 and H.263MPEG-4 is obviously better than H.263
According to Blackberry themselves these are the transcode settings:
Video format: MPEG-4
Video file extension: .AVI
Resolution (4:3): 240×180
Resolution (16:9): 240×135
Video bitrate: 400 kbps
Frames per second: 24
Audio format: MP3
Audio bitrate: 128 kbps
Sample rate: 44 khz
Channels: 2 (Stereo)
I’d suggest you can at increase the bitrate and frame rate if needed.
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MPEG-2 used for DVD has upper limits on datarate so can’t go above 9.8Mb/s and most people would avoid going that high when authoring a DVD.
Secondly you have reduce the frame size considerably and this alone would cut down on the datarate.
Comparing XDCAM/ProRes with MPEG-2 for DVD like going from 10MB RAW to a 1MB JPEG
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AVI is simply a container format that can use any number of CODECS from very lossy (very poor quality) through Divx to DV to uncompressed.
You’ll need to ensure that whatever CODEC you choose to use, they also have.
I suggest you check with them what CODECs they support but in the meantime you should start testing with Huffyuv:
https://neuron2.net/www.math.berkeley.edu/benrg/huffyuv.html
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There are loads of options to reduce the file size. What formats does the Broadcaster accept?
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Hi,
Search this forum, there have been a number of posts about this issue recently.
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Forget cleaner, even the Mac version. Both should be able to read DPX, but they are so out of date and buggy, especially when trying to run XL in a ‘virtual’ setup.
You should be looking at getting your hands on Telestream Episode, which can read DPX and is an excellent compression tool.
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Thank you very much for reporting back on your findings.
If you were to mark out of 10 the products you have tested so far, how would they rate?
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A lot of people ask for uncompressed when they don’t really know what they are talking about. No point delivering uncompressed if it was shot on DV or HDV for example. Some people refer to uncompressed as ‘not compressed any more than the original source’. Everything is compressed when compared to film.
8bit vs 10 or 12 bit, 4:2:2 vs 4:4:4 etc
Compressor is certainly capable of ‘standards conversion’ but the results will not compare to a ‘standards converter’, in the majority of cases.
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To be perfectly honest, don’t bother. In the UK we are very used to getting NTSC DVD’s. 99% of the players over here will play NTSC material.
Should you still want to attempt it, your method will produce substandard quality output. Any process like this ideally needs to go through a dedicated hardware or software standards converter, although if you know what you are doing and are prepared to wait almost forever, compressor or Episode can produce ‘acceptable’ results.
See my reply to the post below this one for some other ideas.
BTW, and in all seriousness, NTSC always looks substandard compared to PAL.
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